Moving Graphic Pictures Adobe ImageReady Question: How To Improve Quality Of GIF Graphic?

Adobe ImageReady question: How to improve quality of GIF graphic? - moving graphic pictures

I try to make a graphic animation in ImageReady for my site with pictures of very high quality, as I did in Photoshop. But he is so fast, I need to save as optimized GIF. However, when I say I have lost a significant amount of quality. Even if I am a professional with experience in Photoshop, but I'm relatively new to ImageReady.

This could be bad graphic design, but also in GIF format that moves and save the things very well, only worse.

How do I solve this problem?
Is there another way?

Thank you!